Whilst I don't doubt it, that policy would restrict them in many scenarios, especially that for which they're intended (apart from scaring people sitting in their gardens due to being a tad loud). I suppose that if they had the wings at full extension it might provide a platform to aquaplane and float for long enough to allow egress from the cockpit into a raft. Maybe they can route over Greenland/Iceland and down to minimise the over-water stretches. Pacific hops would also be a bit challenging for them.